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# Reflections in a Plane Mirror

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### Transcript of "Reflections in a Plane Mirror"

1. 1. Reflections in a Plane Mirror<br />
2. 2. Reflection in a Plane Mirror<br />
3. 3. Activity 4.11<br />How Light Reflects<br />
4. 4. A<br />B<br />
5. 5. Law of Reflection:<br />When light reflects off a surface, the angle of incidence is always equal to the angle of reflection<br />i = r<br />
6. 6. Looking in a mirror<br />
7. 7. Looking in a mirror<br />
8. 8. Looking in a mirror<br />
9. 9. Object distance vs. Image Distance<br />
10. 10. Ray Diagrams<br />for reflections in a plane mirror<br />
11. 11. Step 1<br />Identify the top and the bottom of the object (label these “A” and “B”)<br />
12. 12. Step 2<br />Draw a line from point A that is perpendicular to the mirror<br />
13. 13. Step 3<br />Draw an incident ray (starting at point A)<br />Draw a “normal” where the incident ray hits the mirror<br />Use a protractor to draw a reflecting ray<br />(Remember that i = r )<br />
14. 14. Step 4<br />Extend line A to point Ai (equidistant from point A on the other side of the mirror)<br />Connect point Ai to your reflection ray<br />
15. 15. Step 5<br />Repeat steps 2-4 for Point B<br />
16. 16. Try it!<br />
17. 17. Activity D8<br />Does a plane mirror reverse Left and Right?<br />